This content has not been reviewed within the past year and may not represent Web MD's most up-to-date information. To find the most current information, please enter your topic of interest into our search box. A dose of Proscar, used to reduce symptoms of enlarged prostate (benign prostatic hyperplasia or BPH), has five times more finasteride than a dose of Propecia, used to reduce male pattern hair loss. " April 13, 2012 -- The baldness drug Propecia and the BPH drug Proscar may cause infertility and more sexual problems than previously thought, the FDA warns. Both drugs are known to cause erectile dysfunction in some men. Now labels on both drugs will include new warnings: There's no definitive proof that either Propecia or Proscar actually causes these problems. But the FDA has received enough reports of these side effects to cause concern. Even if the drugs do cause these sexual side effects, they've been reported in only a small number of men. For example, in Propecia clinical trials, 3.8% of men taking the drug and 2.1% of men getting an inactive placebo reported sexual problems. Moreover, the warnings are based on relatively small numbers of reported problems. Along with its needed effects, finasteride (the active ingredient contained in Propecia) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking finasteride: Some side effects of finasteride may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them: Applies to finasteride: oral tablet Most men were older and were taking concomitant medications and/or had comorbid conditions: Very common (10% or more): Impotence (up to 18.5%) Common (1% to 10%): Abnormal ejaculation, decreased ejaculatory volume, abnormal sexual function, gynecomastia, erectile dysfunction, ejaculation disorder, testicular pain, male infertility and/or poor seminal quality Two hundred fourteen reports of gynecomastia in men taking finasteride in the United States were received by the FDA between June 1992 and February 1995. Among those reported, fifty eight percent were taking additional medications that have been associated with gynecomastia. Prednisolone 5mg for cats Amoxicillin 850 mg Best place to buy viagra online uk 2013 Finasteride, a 5-alpha reductase inhibitor, widely used in the medical management of male pattern hairloss, has been reported to cause sexual side effects. While the manufacturers of Propecia concede that loss of libido and erectile dyfunction are known side effects of the drug, they report that these. Both Propecia and Proscar may cause male infertility and/or poor semen quality. This side effect lessens or goes away after men stop taking the. Finasteride, a hair-loss medication reportedly used by footballer Wayne Rooney, 'could cause permanent impotence and shrink genitals in some men' says the Daily Mail. The first is a US TV interview with a man who claimed his genitals shrunk after taking Propecia (finasteride), a drug used to treat male pattern baldness. The second, more verifiable source, is a study that found that finasteride could cause persistent loss of libido and erectile dysfunction. There are a number of significant concerns with both sources. Firstly, there is no hard evidence to back the claims of the man who was interviewed. And the second study included only a very small sample of men, all of whom were experiencing persistent sexual problems, and who were recruited via a website that was set up by men who claimed that finasteride had caused them sexual side effects. This may not necessarily reflect the experiences of all men who take finasteride. While the manufacturers of Propecia concede that loss of libido and erectile dyfunction are known side effects of the drug, they report that these types of side effects are uncommon (clinical trials have observed frequency of 1.8% for loss of libido and 1.3% for erectile dysfunction). Finasteride is used to treat men with benign prostatic hyperplasia (BPH) and male pattern hair loss, also called androgenetic alopecia. Men with BPH usually have difficulty urinating, a decreased flow of urination, hesitation at the beginning of urination, and a need to get up at night to urinate. Finasteride will make these symptoms less severe and reduce the chance that prostate surgery will be needed. It may be used alone or in combination with other medicines such as an alpha-blocker (doxazosin, Cardura®) to treat BPH. For men with hair loss, finasteride will increase the number of scalp hairs but will not increase the amount of body hair. Finasteride blocks the action of an enzyme called 5-alpha-reductase. This enzyme changes testosterone to another hormone that causes the prostate to grow or hair loss in males. It will increase testosterone levels in the body, which decreases prostate size and increases hair growth on the scalp. Propecia side effects in men Propecia - How it Works, Warnings, & Frequent Side Effects, Rooney hair-loss drug 'can shrink men's genitals' - NHS Buy viagra fast delivery Propecia is a prescription drug that is recommended to people with a common hair fall condition called male-pattern baldness. We are here to discuss the possible side. Propecia Side Effects -. Propecia, Proscar New Sexual Dysfunction Warnings - WebMD. Finasteride Side Effects - Taking Propecia or Proscar for Hair.. Finasteride is a medication commonly used to treat hair loss in men. There are a number of side effects associated with this medication, although new studies suggest. The sexual side effects of Propecia may continue after you stop taking it. Talk to. Men aged 55 and over have increased risk of high grade prostate cancer with. Finasteride is a treatment option widely used to treat hair loss androgenetic alopecia in men. Men who have androgenic alopecia have a.